As much as I despise hydrogen, this might be an application. Not
particularly efficient to use, but it does have a much higher energy
density when measured as Wh/g, or 33 kWh / kg, than li-ion cells at best
0.26 kWh/ kg. Ok, my comparison does not include the hydrogen tank or
fuel cell while it does include the cell housing. But it doesn't matter
as the densities are so great.
Peri
<< Annoyed by leaf blowers ? https://quietcleanseattle.org/ >>
------ Original Message ------
From: "Ron via EV" <ev@lists.evdl.org>
To: "Electric Vehicle Discussion List" <ev@lists.evdl.org>
Cc: "Ron" <r...@jadero.com>
Sent: 16-Sep-24 05:37:42
Subject: Re: [EVDL] Upcoming Electric Boat Events
I don't know about Unobtainium, but I think it will probably require some kind
of breakthrough, not just incremental improvements.
Every vehicle has its own version of the rocket equation (you need enough fuel
to carry the fuel, which means a bigger, heavier vehicle, which means yet more
fuel and the fuel needed to carry that fuel, which means a bigger vehicle...).
Boats are particularly challenging because they have hull weight issues that
follow a similar pattern as the rocket equation. It's why I can't just
electrify the speedboat I built: the battery weight basically uses all my
payload and still isn't enough to get me a useful range or running time.
Building a boat that has reserve payload with that battery pack will take me
from a planing hull to a displacement hull (or a planing hull that can't
actually plane because there isn't enough power!)
I have nothing but half-educated guesses, but I bet we have economically viable
short range electric aircraft before we have viable recreational boats of this
type. A wild-ass guess is that the right shoreline charging facilities will get
you about a 50% duty cycle as long as you are willing to push the battery that
hard.
On September 15, 2024 7:57:17 p.m. CST, Mark Hanson via EV <ev@lists.evdl.org>
wrote:
Hi Folks
Has anyone experienced an electric speed boat that can pull skiers for several
hours before recharging? Or is it made of Unobtanium. When I electrified my
www.evalbum.com/2749 E Cat max speed was 7mph on a displacement hull for 30
miles with 48V 10Kwh LiFePo4 Caleb batteries about 10 years ago. Back to gas
lean burn Honda BFP60 planing hull for H20 skiing.
Best regards Mark
https://www.electrifiedmarina.com/2024-eboat-expo
Sent from my iPhone
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Ron
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